Mars

Full size image of Mars (207 KB.)

Constants

•  Mean Radius:               3389.5 km

•  Mass:                      0.108 (Earth=1)

•  Density:                   3.94 (g/cm^3)

•  Gravity:                   0.380 (Earth=1)

•  Orbit Period:              686.98 (Earth days)

•  Rotation Period:           1.026 (Earth days)

•  Semimajor Axis of Orbit:   1.524 au

•  Eccentricity of Orbit:     0.093

Links to the Satellites of Mars

• Deimos
• Phobos

Mars Pathfinder

USGS Involvement in the Mars Pathfinder Mission.

Mars Nomenclature

Official names of features on Mars as approved by the International Astronomical Union.

The PDS Mars Explorer

Explore Mars by creating your own maps.

The Martian Hemispheres

Mosaics of the Martian Hemispheres created by the USGS from Viking Orbiter images.

Valles Marineris: The Grand Canyon of Mars

Images of the martian canyon, primarily in the central region, Ophir and Candor Chasmata, created by merging Viking images with topographic maps.

Other Web resources

• Information on current spacecraft missions to Mars can found in JPL's Mars Exploration Program.
• NASA Ames Research Center has a neat scrollable Mars Atlas developed using USGS maps.